Hi..
Can understand your concern..
As per your complain swelling of the lower lip and soreness of chin after dental impression can occur either as an
allergic reaction with any of the components of the impression material though it is not a frequent finding but may happen in some cases.
It may also be due to any component of salt which was given to you.
One reason can be that during the impression procedure the impression tray may cause
injury to the mucosa and soft structures inside the mouth if excessive pressure is applied leading to soreness and at times some swelling..
You may also be allergic to the latex present in the gloves worn by the
dentist.
In some conditions if the allergic reaction is not severe and is not causing you any botheration, the symptoms subsides after few hours of the removal of the allergen.
But if you have any other associated problem like
anxiety,
hives,rashes, difficulty in breathing etc or if the symptoms keeps progressing you should immediately consult a doctor and get an anti allergic treatment .
Hope your query is solved..
Thanks and regards..
Dr.Honey Nandwani Arora.